Four fours

[fourier jr]

Here's an old one: starting with 0 (or 1) list all the natural numbers using nothing but 4 4s. I'll go first.
0 = (4 - 4)/(4*4)
1 = (4*4)/(4*4)
2 = (4*4)/(4*sqrt(4))
.... etc

[arildno]

See the last posts in this thread:
http://www.physicsforums.com/showthread.php?t=27906&page=2

[fourier jr]

i saw the thread a couple days ago, but i didn't see the stuff about the fours. argh